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원문 게시자: redstainedfriday ,

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Xiaomi Mi4 in Recovery Mode loop & no connection with PC

본문:

Hi! I’d be extremely thankful to hear your thoughts on this case.

I’ve got a Xiaomi Mi4 in a recovery mode loop (Mi Recovery 2.0.1) that can’t enter Fastboot mode and can’t get connected to a PC to get flashed. There is no SD card slot for this model to upload a ROM (update.zip in this case) on or it would be a cake.

History:

- phone was dropped from the 5th floor. Everything works properly (getting calls, messages) except for the LCD touch and the VOL UP button.

- out of warranty so ordered a spare LCD. I have experience fixing 15+ different phones with the same issue successfully.

- while getting the battery out carefully following a YT video while disconnected from the circuit board and all the other components the battery pack started heating quickly and smoking. Most importantly, it was disconnected from everything when this happened. I was using plastic tools when removing it but it could still be caused by sloppiness.

- ordered a spare battery

- ordered a spare power/volume control unit (not received yet)

- got new LCD and installed it. When booted (both holding power button or vol(-) + power button or vol(+)+power button) the phone goes to Mi Recovery 2.0.1

- wiped all data using Mi Recovery but still can’t boot to MIUI or Fastboot

- phone is charging when the micro USB is plugged into a power source.

This gets us to the next logical step – flash a new ROM:

- got Mi PC Suite to flash but can’t connect

- got Mi Flash Tool but it can’t  find a device

- got ADB/Fastboot  but it doesn’t find a device with "all devices" in command line

- got the phone charged to 100% as advised by a YoutTube video but nothing changes.

Next logical step – find drivers and try different PCs. Those are the drivers I installed on 2 laptops with Win 7 Pro and Win 8, as there was no notification of a new device in Device Manager. I have always restarted PC with Disable Driver Signature Enforcement option:

- Minimal ADB Fastboot

- official Xiaomi Mi4 drivers for Windows

- Samsung Android drivers

- Qualcomm Hs Usb Qdloader 9008 Com3 Driver

- OEM USB Drivers

I have also tried:

- removing the ‘Disconnect power from USB ports while not in use’ feature in Device Manager

- Adding a device using Devices and printers (PC can’t find anything)

- having the device both turned off and in Recovery Mode while plugging to the PC.

Last hope: getting the volume/power button unit replaced so I can get to Fastboot while holding VolUp and Power, but that doesn’t help the case where it’s not recognized by the PC.

Thanks!

기기:

Xiaomi Mi 4

현황:

open